Functions of the uterus include nurturing the fertilized ovum that develops into the fetus and holding it till the baby is mature enough for birth. The uterus provides structural integrity and support to the bladder, bowel, pelvic bones and organs as well. It separates the bladder and the bowels. The uterus is needed for the uterine orgasm to occur. The uterus lies in the pelvis behind the urinary bladder and in front of the rectum. The uterus is a pear-shaped muscular organ.